Error 451 4.4.0 - Messages Queueing after removal of connector

[GeorgeTuk]

Hi guys,

Turned off the old Exchange 2003 mail server a few hours ago and can now receive fine but sending doesn't work, it gets stuck in a queue on the server with the error "Error 451 4.4.0 Primary target IP address responded with "421 4.2.1 Unable to connect""

Any ideas...I am really stuck for ideas as it worked with the connector but not now.

Thanks for any help!

George

 

[Zelandakh]

I'd assume your Ex2007 server was sending via Exchange 2003. Look at the 2007 connector and see then repoint it to either your SmartHost, your ISP or just let it kick them out directly to destination.